Application of lighting of different spectral composition in microclonal propagation of berry and ornamental plants

The results of research into the impact of LED illumination on the growth and development of regenerated plants of three varieties of common lilac Syringa vulgaris L. and one variety of Vaccinium corymbosum L. in the process of microclonal propagation in vitro are presented. The average photon flux density at the level of the outer glass surface of the cultivation vessel was about 30–35 μmol/m2-s for common lilac and about 20-25 μmol/m2-s for highbush blueberry. The highest number of shoots in regenerated plants of Duke's blueberry cultivar was revealed under illumination with LED lamps of SVD2. The height of microshoots under the variant SVD1 and SVD2 was maximum and practically equal. The use of LED lights of the SVD1 and SVD2 variant allows obtaining a larger number of cuttings of high blueberry for subsequent propagation in vitro, compared to other tested variants of the spectral composition of illumination. The light wavelengths suitable for each lilac cultivar should be selected experimentally. The best result of the regenerants height index for the variety Memory of Kolesnikov was in the control lighting variant.